CN110223830B - Framework structure for induction coil of embedded molten steel level sensor - Google Patents
Framework structure for induction coil of embedded molten steel level sensor Download PDFInfo
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- CN110223830B CN110223830B CN201910531820.6A CN201910531820A CN110223830B CN 110223830 B CN110223830 B CN 110223830B CN 201910531820 A CN201910531820 A CN 201910531820A CN 110223830 B CN110223830 B CN 110223830B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
Abstract
The invention discloses a framework structure for an induction coil of an embedded molten steel liquid level sensor, which comprises a cylinder ring winding carrier and a convex fastening plug arranged at one end of the cylinder ring winding carrier, wherein the cylinder ring winding carrier and the convex fastening plug are both arranged in an outer protective body of the sensor; the cylinder surrounding winding carrier comprises a core part center column used for winding a primary coil subjected to eddy current regression, a first tile body used for winding a secondary coil with judging and deviation compensating capabilities, and a second tile body used for winding a final coil for transmitting an electromagnetic signal; the first tile-shaped body and the second tile-shaped body are coaxial and are connected up and down, and the first tile-shaped body and the second tile-shaped body form a cylindrical structure; the core center pillar is disposed within the tubular structure. The invention has the beneficial effects that: the invention carries out non-filtering data acquisition and analysis on the signals of the induction coil in the embedded molten steel liquid level sensor, carries out structural design on the induction coil framework of the measurement core component of the embedded molten steel liquid level sensor, and ensures the high temperature resistance and the anti-interference performance of the electromagnetic coil component of the sensor and the matching performance of the electromagnetic coil component of the sensor with the original preamplifier and a signal processor.
Description
Technical Field
The invention relates to the technical field of molten steel level detection, in particular to a framework structure for an induction coil of an embedded molten steel level sensor.
Background
In modern continuous casting production, embedded (electromagnetic) molten steel level sensors are used for 80% of domestic and foreign continuous casting machine platforms, and the market share is very high. As one of the key equipments of the continuous casting machine, the embedded (electromagnetic type) molten steel level sensor is a nondestructive and non-contact type level sensor based on electromagnetic induction, and the factors of complicated structure, high production cost, inconvenient maintenance and the like restrict the continuous casting production of steel mills. The magnetic induction coil is a core component of the liquid level sensor, and the specification parameters, the structure and the material of the framework of the magnetic induction coil directly influence the quality of the magnetic induction coil, the control precision of the electromagnetic induction quantity and the accuracy of effective signals and signals to be detected. However, the induction coil frameworks in some domestic sensors are susceptible to interference from external factors after being wound, and the coils are filled with positioning glue and heat-conducting glue, so that the heat dissipation effect is not ideal, and the liquid level sensor cannot meet the requirement of higher and higher liquid level measurement accuracy.
Disclosure of Invention
The invention aims to provide a framework structure for an induction coil of an embedded molten steel level sensor, which has strong anti-interference capability and good heat dissipation effect and aims to overcome the defects of the prior art.
The technical scheme adopted by the invention is as follows: a skeleton structure for an induction coil of an embedded molten steel liquid level sensor comprises a cylinder ring winding carrier and a convex fastening plug arranged at one end of the cylinder ring winding carrier, wherein the cylinder ring winding carrier and the convex fastening plug are arranged in an outer protective body of the sensor; the cylinder surrounding winding carrier comprises a core part center column used for winding a primary coil subjected to eddy current regression, a first tile body used for winding a secondary coil with judging and deviation compensating capabilities, and a second tile body used for winding a final coil for transmitting an electromagnetic signal; the first tile-shaped body and the second tile-shaped body are coaxial and are connected up and down, and the first tile-shaped body and the second tile-shaped body form a cylindrical structure; the core center pillar is disposed within the tubular structure.
According to the scheme, a first annular wire slot is formed in the first tile-shaped body along the circumferential direction, and the secondary coil is wound in the first annular wire slot; and a second annular wire groove is formed in the second tile-shaped body along the circumferential direction, and the final coil is wound in the second annular wire groove.
According to the scheme, the first tile-shaped body and the second tile-shaped body are both of split structures; the first tile-shaped body comprises a first split body A and a first split body B which are respectively located at two ends of the center pillar of the core part, the second tile-shaped body comprises a second split body A which corresponds to and is connected with the first split body A and a second split body B which corresponds to and is connected with the first split body B, and the second split body A and the second split body B are respectively located at two ends of the center pillar of the core part.
According to the scheme, the first split body A/the first split body B is provided with the equally-divided lead groove, and the lead groove extends from the top of the first split body A/the first split body B to the bottom of the second split body A/the second split body B.
According to the scheme, a central through hole is formed in the central column of the core part, and two ends of the central through hole penetrate through the lead grooves on two sides; two terminals of each wire section of the primary coil wound on the central column of the core part and the secondary coil wound on the first tile-shaped body are led out through the central through hole and are electrically connected after being pulled out of the framework along the lead groove.
According to the scheme, the tops of the first split body A and the first split body B extend inwards in the radial direction, the extending parts are provided with O-shaped groove surfaces, and X-shaped grooves meshed with phi-shaped gears at the inner ends of the outer protection bodies are formed in the O-shaped groove surfaces at intervals.
According to the scheme, the end face of the extension part is provided with an inclined chamfer.
According to the scheme, the convex fastening plug comprises a base and a cylindrical boss arranged on the base, wherein the boss can be inserted into the tubular structure and is matched with a step platform in the tubular structure; a cylindrical hole is formed in the boss and extends from the top of the boss to the bottom of the base; the base is also provided with two symmetrical arc ear grooves.
According to the scheme, the central column of the core part is of a rectangular structure, and the peripheral surface of the central column of the core part is provided with a chamfer.
The invention has the beneficial effects that: the invention carries out non-filtering data acquisition and analysis on the signal of the induction coil in the embedded molten steel liquid level sensor, carries out structural design on the induction coil framework of the measurement core component, ensures the high temperature resistance and the anti-interference performance of the electromagnetic coil component of the sensor and the matching performance with the original preamplifier and a signal processor, meets the requirements of accurate, safe, stable and reliable crystallizer molten steel liquid level detection, solves the problem of production spare parts of the embedded sensor of the crystallizer of a continuous casting machine, reduces the production cost, is convenient to maintain, and can form core technology and products in the field; the framework structure can be simply, quickly and safely installed in a seamless mode, alignment between the framework structure and the outer protective body of the sensor is guaranteed, connection is more reliable, and performance is fully exerted; can reduce installation and trade manufacturing cost and time in every link, it is stronger to maintain the convenience, and smooth outside profile does not hide the stain in the direct washing in-process, and heat radiation structure's exquisite design more does benefit to the derivation of inductance coils magnetic core center heat.
Drawings
Fig. 1 is a schematic structural view of a bobbin-surrounding wire carrier according to the present invention.
Fig. 2 is a front view of the cartridge surround wire carrier.
Fig. 3 is a left side view of the cartridge surround wire carrier.
Fig. 4 is a top view of the cartridge surround wire carrier.
Fig. 5 is a schematic structural view of the male fastener plug in this embodiment.
Fig. 6 is a left side view of a male fastening competition.
FIG. 7 is a top view of a male fastener competition.
Fig. 8 is a schematic view of a bobbin-surrounding bobbin carriage wound with a coil.
Fig. 9 is a schematic structural view of the sensor outer protector.
Fig. 10 is a schematic structural view of the framework structure and the telescopic pipe screw assembled to the outer protective body in this embodiment.
FIG. 11 is a schematic structural view of a sensor body for molten steel level according to the present invention.
Wherein: 1-a sensor body, 2-an outer protective body, 3-a telescopic pipe screw rod, 4-a framework structure, 5-an X-shaped groove, 6-an O-shaped groove surface, 7-an inclined chamfer, 8-a core center post, 9-a first tile body, 10-a second tile body, 11-a center through hole, 12-a lead groove, 13-a step platform, 14-a cylindrical hole and 15-an arc-shaped lug groove; 16. a primary coil; 17. a secondary coil; 18. a final-pole coil; 19. a male fastener plug.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
A skeleton structure used for the embedded molten steel level sensor induction coil, including bobbin ring winding carrier and convex fastening plug 19 mounted to one end of bobbin ring winding carrier, said bobbin ring winding carrier and convex fastening plug 19 are all located in the outer protective body 2 of the sensor; as shown in fig. 1 to 4, the bobbin surround winding carrier comprises a core center leg 8 for winding a primary coil 16 (i.e., a receiving coil) subjected to eddy current regression, a first tile 9 for winding a secondary coil 17 (a compensating coil) having judging and deviation compensating capabilities, and a second tile 10 for winding a final coil 18 (a transmitting coil) for transmitting an electromagnetic signal; the first tile-shaped body 9 and the second tile-shaped body are coaxial and are connected up and down, and the first tile-shaped body and the second tile-shaped body form a cylindrical structure; the core center pillar 8 is provided in the cylindrical structure. In the present embodiment, the core center pillar 8 has a rectangular parallelepiped structure, and the outer peripheral surface of the core center pillar 8 is chamfered.
Preferably, a first annular wire slot is formed in the first tile-shaped body 9 along the circumferential direction, and the secondary coil 17 is wound in the first annular wire slot; and a second annular wire groove is formed in the second tile-shaped body 10 along the circumferential direction, and the final coil is wound in the second annular wire groove.
Preferably, the first tile-shaped body 9 and the second tile-shaped body are both split-type structures; the first tile-shaped body 9 includes a first division a and a first division B respectively located at both ends of the core center pillar 8, and the second tile-shaped body 10 includes a second division a corresponding to and connected to the first division a and a second division B corresponding to and connected to the first division B, which are respectively located at both ends of the core center pillar 8.
Preferably, the first division body a/the first division body B is provided with a bisected lead groove 12, and the lead groove 12 extends from the top of the first division body a/the first division body B to the bottom of the second division body a/the second division body B. In this embodiment, the lead groove 12 facilitates the leading-out of each lead terminal of the tertiary coil.
Preferably, a central through hole 11 is formed in the core center pillar 8, and two ends of the central through hole 11 penetrate through the lead grooves 12 on two sides. The primary coil 16 wound on the center column 8 of the inner core part of the cylinder surrounding wire carrier and the two terminals of each wire section of the secondary coil 17 wound on the first tile-shaped body 9 are led out through the center through hole 11 and are electrically connected after being pulled out of the framework along the lead groove 12. The central through hole 11 effectively overcomes the common defects of easy breaking of a coil, abrasion of an insulating layer and the like caused by lateral core pulling and reversing pushing, and provides an important guarantee effect for enhancing the reliability and convenience of the performance of parts. In addition, the primary coil 16 wound on the central pillar 8 of the core is wrapped inside the other two coils, and the central heat of the primary coil is assisted to dissipate heat through the central through hole 11.
Preferably, the tops of the first sub-body a and the first sub-body B extend radially inward, the extending portions are provided with O-shaped groove surfaces 6, and the O-shaped groove surfaces 6 are provided with X-shaped grooves 5 at intervals, which are engaged with the phi-shaped gears at the inner ends of the outer protective bodies 2. In order to improve the sensitivity and the detection precision, the top end of the induction coil which is more attached and arranged in the outer protective body 2 is closer to the measuring point, and the end face of the extending part is provided with an inclined chamfer 7.
Preferably, as shown in fig. 5 to 7, the male fastening plug 19 comprises a base and a cylindrical boss arranged on the base, wherein the boss can be inserted into the tubular structure and is matched with the step platform 13 in the tubular structure; a cylindrical hole 14 is formed in the boss, and the cylindrical hole 14 extends from the top of the boss to the bottom of the base; two symmetrical arc ear grooves 15 are also arranged on the base. In this embodiment, the cylindrical holes 14 of the bosses facilitate heat dissipation from the primary coil 16.
In the present invention, the skeleton structure 4 uses one of aluminum nitride (AlN), zinc oxide (ZnO) and lead zirconate titanate (PZT) as a substrate instead of high frequency porcelain to reduce dielectric or barrier cap loss. There are several parameters of the material chosen that must be considered: intrinsic attenuation, AlN and ZnO exhibit sufficiently high intrinsic attenuation; coefficient of thermal expansion, AlN (4.0-6.0). times.10-6The temperature is quite low, and has little influence on the temperature drift in the period; thermal conductivity, AlN HeatThe conductivity is about 320W/m.k, which is 5 to 8 times higher than that of the alumina; the mechanical property and the breaking strength are higher than those of aluminum oxide, so that the aluminum oxide is more convenient to process and cut into various shapes; the dielectric constant and PZT index have obvious advantages, and the impedance level can be enhanced by reducing the size of the device.
According to the framework, the X-shaped groove 5 is formed in the radial extension section of the first tile-shaped body 9 of the framework, so that the framework can be horizontally positioned at the top of the outer protective body 2 of the sensor; the radial extension section of the first tile-shaped body 9 is provided with an O-shaped groove surface 6 for accurately positioning the axis of the framework; the radial extension section of the first tile-shaped body 9 is provided with an inclined chamfer 7 which is perfectly attached to the bottom of the outer protective body 2 of the sensor, so that the induction coil is closer to a measuring point; the core center pillar 8 arranges a receiving coil; the first tile 9 arranges a compensation coil; the second tile 10 arranges the transmitting coil; a central through hole 11, a drawing and reversing lead terminal and a receiving coil heat dissipation guide hole are arranged; a step platform 13 on the core center pillar 8 is embedded with a convex fastening plug 19; the arc ear grooves 15 on two sides of the side part of the upper end of the convex fastening plug 19 are convenient to be clamped and installed on the cylinder ring winding carrier by using U-shaped clamps; the cylindrical hole 14 hollowed out in the center of the convex fastening plug 19 is matched with the tail end of the telescopic pipe screw rod 3 to lock and fix the whole framework in the sensor outer protective body 2.
As shown in fig. 11, the molten steel level sensor based on the framework structure 4 comprises a sensor body 1, the framework structure 4 wound with an induction coil, a telescopic pipe screw rod 3 and a sensor outer protective body 2, wherein a convex fastening plug 19 of the framework structure 4 is buckled on a cylinder ring winding carrier through arc-shaped lug grooves 15 at two sides of the side part of the convex fastening plug 19 clamped by a U-shaped clamp; the end of the telescopic pipe screw rod 3 is matched with the cylindrical hole 14 of the convex fastening plug 19, and the telescopic pipe screw rod 3 extends into the cylindrical hole 14. The hold-down induction coil is rotated to be fixed in the outer protective body 2 of the sensor (after the cartridge surround bobbin carriage is assembled with the male fastening plug 19, it is pressed into the outer protective body 2 by the telescopic tube screw 3, as shown in fig. 9 and 10). The reasonable design of the cover improves the sealing material and prolongs the service life.
In this embodiment, the sensor body 1 has a symmetrical structure, and adopts a differential sensor composed of two sets of electromagnetic sensors, which are symmetrically distributed on two sides of the central shaft.
In the present invention, as shown in fig. 8, a primary coil 16 for receiving eddy current regression is wound around an inner core center post 8 in a bobbin-surrounding bobbin carriage of a bobbin structure 4, the cross section of the core center post 8 is rectangular, a secondary coil 17 capable of judgment and offset compensation is wound around a first tile-shaped body 9, and a final coil 18 for transmitting an electromagnetic signal is wound around a second tile-shaped body 10. Considering the size of the direct current resistance of the coil, multiple and single insulated wires, selecting the wire diameter thickness, the quality factors of the inductance coil, the wire turn interval during winding and other factors, and designing the reasonable inner diameter, the axial length, the thickness and other dimensions of the three-level coil winding frame of the bobbin ring winding carrier according to requirements. The skeleton structure 4 is formed by winding insulating copper wires with different thicknesses and specifications into an induction coil assembly, then selecting measuring point positions to be arranged at the top of the sensor outer protective bodies 2 at two ends of the molten steel liquid level sensor body 1, and can be matched with an existing preamplifier and a signal processor to accurately measure the liquid level of molten steel.
Having described preferred embodiments of the present invention, it is not intended to limit the scope of the present invention, and further modifications and variations of the embodiments may be made thereto by those skilled in the art once they learn of the basic inventive concepts, and they are included in the scope of the present invention if they come within the scope of the claims and their equivalents.
Claims (8)
1. A framework structure for an induction coil of an embedded molten steel liquid level sensor is characterized by comprising a cylinder ring winding carrier and a convex fastening plug arranged at one end of the cylinder ring winding carrier, wherein the cylinder ring winding carrier and the convex fastening plug are arranged in an outer protective body of the sensor; the cylinder surrounding winding carrier comprises a core part center column used for winding a primary coil subjected to eddy current regression, a first tile body used for winding a secondary coil with judging and deviation compensating capabilities, and a second tile body used for winding a final coil for transmitting an electromagnetic signal; the first tile-shaped body and the second tile-shaped body are coaxial and are connected up and down, and the first tile-shaped body and the second tile-shaped body form a cylindrical structure; the central column of the core part is arranged in the cylindrical structure; the first tile-shaped body and the second tile-shaped body are both split structures; the first tile-shaped body comprises a first split body A and a first split body B which are respectively located at two ends of the center pillar of the core part, the second tile-shaped body comprises a second split body A which corresponds to and is connected with the first split body A and a second split body B which corresponds to and is connected with the first split body B, and the second split body A and the second split body B are respectively located at two ends of the center pillar of the core part.
2. The framework structure for the induction coil of the embedded molten steel liquid level sensor, according to claim 1, wherein the first tile-shaped body is circumferentially provided with a first annular wire slot, and the secondary coil is wound in the first annular wire slot; and a second annular wire groove is formed in the second tile-shaped body along the circumferential direction, and the final coil is wound in the second annular wire groove.
3. The skeleton structure of an embedded molten steel level sensor induction coil according to claim 1, wherein the first split body A/the first split body B is provided with a bisected lead groove, and the lead groove extends from the top of the first split body A/the first split body B to the bottom of the second split body A/the second split body B.
4. The skeleton structure of an embedded molten steel level sensor induction coil according to claim 1, wherein a central through hole is formed in the center pillar of the core, and two ends of the central through hole penetrate through the lead grooves on two sides; two terminals of each wire section of the primary coil wound on the central column of the core part and the secondary coil wound on the first tile-shaped body are led out through the central through hole and are electrically connected after being pulled out of the framework along the lead groove.
5. The skeleton structure of claim 1, wherein the tops of the first split body A and the first split body B extend radially inward, the extending portions of the first split body A and the first split body B are provided with O-shaped groove surfaces, and the O-shaped groove surfaces are provided with X-shaped grooves at intervals, wherein the X-shaped grooves are meshed with phi-shaped gears at the inner ends of the outer protective bodies.
6. The skeleton structure for an embedded molten steel level sensor induction coil according to claim 5, wherein an end surface of the extension portion is provided with an inclined chamfer.
7. The framework structure for the induction coil of the embedded molten steel level sensor as claimed in claim 1, wherein the convex fastening plug comprises a base and a cylindrical boss arranged on the base, the boss can be inserted into the tubular structure and is matched with a step platform in the tubular structure; a cylindrical hole is formed in the boss and extends from the top of the boss to the bottom of the base; the base is also provided with two symmetrical arc ear grooves.
8. The skeleton structure for an embedded molten steel level sensor induction coil according to claim 1, wherein the core center pillar is a rectangular parallelepiped structure, and an outer circumferential surface of the core center pillar is provided with a chamfer.
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| CN201910531820.6A CN110223830B (en) | 2019-06-19 | 2019-06-19 | Framework structure for induction coil of embedded molten steel level sensor |
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| CN111457990A (en) * | 2020-04-30 | 2020-07-28 | 国电锅炉压力容器检验有限公司 | Tabi type eddy current coil set liquid level meter and liquid level measuring method |
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| CN105628137B (en) * | 2016-02-22 | 2020-01-24 | 中国原子能科学研究院 | Sodium liquid level detection device |
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| FR2108809A1 (en) * | 1970-10-07 | 1972-05-26 | Commissariat Energie Atomique | Level meter - for liquid metals eg sodium at high temp |
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Effective date of registration: 20220324 Address after: 201999 No. 3520, Tongji Road, Baoshan District, Shanghai Patentee after: Baowu equipment Intelligent Technology Co.,Ltd. Address before: 430083 No. 2 Gate in front of Factory, Qingshan District, Wuhan City, Hubei Province Patentee before: WUHAN IRON AND STEEL Co.,Ltd. |